Inventor · disambiguated record
Ken Sakamura
Also filed as: SAKAMURA KEN
43 granted patents·8 pending applications·1,115 citations·filing 1979–2011
98Inventor score
Files withSAKAMURA KEN13MITSUBISHI ELECTRIC CORP12NTT DOCOMO INC8MIYAZAKI SHINGO4MATSUMOTO HISANORI3
Top patents by PatentIndex Score
51 records- 0198US5201039AMultiple address-space data processor with addressable register and context switchingMITSUBISHI ELECTRIC CORP·Filed 1990·Granted Apr 6, 1993·481 cites·16 claims
- 0291US8306919B2IC card and authentication method in electronic ticket distribution systemSAKAMURA KEN·Filed 2007·Granted Nov 6, 2012·46 cites·2 claims
- 0384US5029069AData processorMITSUBISHI ELECTRIC CORP·Filed 1988·Granted Jul 2, 1991·78 cites·15 claims
- 0480US5132898ASystem for processing data having different formatsMITSUBISHI ELECTRIC CORP·Filed 1990·Granted Jul 21, 1992·79 cites·21 claims
- 0576US8370643B2Cryptographic module selecting device and programTOSHIBA SOLUTIONS CORP·Filed 2008·Granted Feb 5, 2013·8 cites·9 claims
- 0676US8122261B2Data communication apparatus and data communication methodSAKAMURA KEN·Filed 2005·Granted Feb 21, 2012·7 cites·2 claims
- 0776US7814557B2IC card and access control methodNTT DOCOMO INC·Filed 2005·Granted Oct 12, 2010·8 cites·3 claims
- 0874US4334269AData processing system having an integrated stack and register machine architecturePANAFACOM LTD·Filed 1979·Granted Jun 8, 1982·41 cites·7 claims
- 0972US7975029B2Terminal equipmentNTT DOCOMO INC·Filed 2006·Granted Jul 5, 2011·6 cites·5 claims
- 1072US7403924B2Communication terminal, portable terminal, circulating server, providing server, electronic book distributing method, and electronic book distributing programNTT DOCOMO INC·Filed 2003·Granted Jul 22, 2008·15 cites·11 claims
- 1172US5182811AException, interrupt, and trap handling apparatus which fetches addressing and context data using a single instruction following an interruptMITSUBISHI ELECTRIC CORP·Filed 1990·Granted Jan 26, 1993·62 cites·20 claims
- 1271US7580897B2IC card and authentication method in electronic ticket distribution systemSAKAMURA KEN·Filed 2003·Granted Aug 25, 2009·21 cites·4 claims
- 1369US8417964B2Software module management device and programMIYAZAKI SHINGO·Filed 2008·Granted Apr 9, 2013·4 cites·20 claims
- 1469US7896236B2Electronic value exchange system and electronic value exchange methodNTT DOCOMO INC·Filed 2006·Granted Mar 1, 2011·4 cites·4 claims
- 1569US7346718B2Autonomous integrated-circuit cardSAKAMURA KEN·Filed 2003·Granted Mar 18, 2008·14 cites·15 claims
- 1668US7416114B2Electronic value transfer device equipped with non-contact IC interfaceSAKAMURA KEN·Filed 2003·Granted Aug 26, 2008·1 cites·8 claims
- 1768US5680568AInstruction format with sequentially performable operand address extension modificationMITSUBISHI ELECTRIC CORP·Filed 1994·Granted Oct 21, 1997·50 cites·19 claims
- 1867US8688969B2Cryptographic management apparatus, decryption management apparatus and programMIYAZAKI SHINGO·Filed 2008·Granted Apr 1, 2014·4 cites·14 claims
- 1964US7357329B2IC card, terminal device, and data communication methodSAKAMURA KEN·Filed 2003·Granted Apr 15, 2008·11 cites·12 claims
- 2063US2004158490A1Communication terminal, server apparatus, electronic worth charging method, and electronic worth charging programNTT DOCOMO INC·Filed 2003·Application pending·0 cites
- 2160US8406422B2Cryptographic module management apparatus, method, and programMIYAZAKI SHINGO·Filed 2008·Granted Mar 26, 2013·2 cites·10 claims
- 2260US8396218B2Cryptographic module distribution system, apparatus, and programMIYAZAKI SHINGO·Filed 2008·Granted Mar 12, 2013·2 cites·35 claims
- 2360USD668640SAntenna for wireless communicationMATSUMOTO HISANORI·Filed 2011·Granted Oct 9, 2012·12 cites·1 claims
- 2460US7882030B2Connection information management system for managing connection information used in communications between IC cardsNTT DOCOMO INC·Filed 2003·Granted Feb 1, 2011·0 cites·14 claims
- 2560US2004044625A1Digital contents issuing system and digital contents issuing methodKEN SAKAMURA·Filed 2003·Application pending·0 cites
- 2659US2007250455A1Communication terminal, portable terminal, circulating server, providing server, electronic book distributing method, and eletronic book distributing programNOBORU KOSHIZUKA·Filed 2007·Application pending·0 cites
- 2759US2007149867A1Communication terminal, server apparatus, electronic worth charging method, and electronic worth charging programNOBORU KOSHIZUKA·Filed 2007·Application pending·0 cites
- 2856US5274637AToken-ring-type local area networkYAMAHA CORP·Filed 1990·Granted Dec 28, 1993·36 cites·10 claims
- 2953USD668638SAntenna for wireless communicationMATSUMOTO HISANORI·Filed 2011·Granted Oct 9, 2012·9 cites·1 claims
- 3052US8468094B2Electronic value exchange system, mobile terminal, and electronic value exchange methodSAKAMURA KEN·Filed 2005·Granted Jun 18, 2013·0 cites·6 claims
- 3151US7340243B2Connection information management system for managing connection information used in communications between IC cardsSAKAMURA KEN·Filed 2003·Granted Mar 4, 2008·1 cites·7 claims
- 3249US5140684AAccess privilege-checking apparatus and methodMITSUBISHI ELECTRIC CORP·Filed 1991·Granted Aug 18, 1992·21 cites·12 claims
- 3348US5606675AData processor for invalidating prefetched instruction or branch history informationMITSUBISHI ELECTRIC CORP·Filed 1992·Granted Feb 25, 1997·20 cites·7 claims
- 3447US2004030896A1IC card and cryptographic communication method between IC cardsKEN SAKAMURA·Filed 2003·Application pending·0 cites
- 3544US2003228886A1Electronic value data communication method, communication system, IC card, portable terminal, and communicationNTT DOCOMO INC·Filed 2003·Application pending·0 cites
- 3642US8161499B2Data processing device and data processing methodSAKAMURA KEN·Filed 2005·Granted Apr 17, 2012·0 cites·5 claims
- 3742US2007204148A1Ic Card And Authority Transfer Control MethodNOBORU KOSHIZUKA·Filed 2005·Application pending·0 cites
- 3841US2006163364A1Ic chip, card and mobile terminal connected to the sameNTT DOCOMO INC·Filed 2003·Application pending·0 cites
- 3940USD668639SAntenna for wireless communicationMATSUMOTO HISANORI·Filed 2011·Granted Oct 9, 2012·4 cites·1 claims
- 4039US4926321AMethod of searching a queue in response to a search instructionSAKAMURA KEN·Filed 1987·Granted May 15, 1990·9 cites·5 claims
- 4138US5121474ABit string data processor using dynamically addressable bit locations in memory so overlapping strings do not destroy data in memoryMITSUBISHI ELECTRIC CORP·Filed 1991·Granted Jun 9, 1992·10 cites·18 claims
- 4238US4941085AData processing system having apparatus for increasing the execution speed of bit field instructionsSAKAMURA KEN·Filed 1987·Granted Jul 10, 1990·9 cites·6 claims
- 4337US4945472AData processor with I/O area detectionMITSUBIHSI ELECTRIC CORP·Filed 1988·Granted Jul 31, 1990·11 cites·19 claims
- 4435US5210835AData processing system having apparatus for increasing the execution speed of bit field instructionsSAKAMURA KEN·Filed 1990·Granted May 11, 1993·8 cites·20 claims
- 4535US4977497AData processorMITSUBISHI ELECTRIC CORP·Filed 1989·Granted Dec 11, 1990·6 cites·3 claims
- 4633US5170474AMethod of searching a queue in response to a search instructionHITACHI LTD·Filed 1991·Granted Dec 8, 1992·6 cites·9 claims
- 4732US5398319AMicroprocessor having apparatus for dynamically controlling a kind of operation to be performed by instructions to be executedSAKAMURA KEN·Filed 1992·Granted Mar 14, 1995·5 cites·22 claims
- 4831US5327542AData processor implementing a two's complement addressing techniqueMITSUBISHI ELECTRIC CORP·Filed 1993·Granted Jul 5, 1994·2 cites·4 claims
- 4930US5434988AData processor implementing a two's complement addressing techniqueMITSUBISHI ELECTRIC CORP·Filed 1994·Granted Jul 18, 1995·0 cites·7 claims
- 5029US5073856AMethod of searching a queue in response to a search instructionHITACHI LTD·Filed 1990·Granted Dec 17, 1991·1 cites·9 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →